Allow breaking line after space with white-space: break-spaces
white-space: break-spaces should allow a soft wrap opportunity after
every preserved white space. Then, to avoid breaking before the first
white space, TextRunSegment::shape_text() has some logic to separate
it from the following spaces and put it with the preceding text instead.
The problem was that, when combined with word-break: keep-all, we were
then only checking whether there were more white spaces afterwards,
ignoring the soft wrap opportunity after the first one.
Also removing a duplicated can_break_anywhere variable.
Signed-off-by: Oriol Brufau obrufau@igalia.com